Package org.apache.commons.codec

Class StringEncoderComparator

java.lang.Object

org.apache.commons.codec.StringEncoderComparator

All Implemented Interfaces:

Comparator

public class StringEncoderComparator
extends Object
implements Comparator

Compares Strings using a StringEncoder. This comparator is used to sort Strings by an encoding scheme such as Soundex, Metaphone, etc. This class can come in handy if one need to sort Strings by an encoded form of a name such as Soundex.

This class is immutable and thread-safe.

Constructor Summary

Constructors

Constructor	Description
StringEncoderComparator()	Deprecated. Creating an instance without a StringEncoder leads to a NullPointerException.
StringEncoderComparator(StringEncoder stringEncoder)	Constructs a new instance with the given algorithm.

Method Summary

Modifier and Type	Method	Description
int	compare(Object o1, Object o2)	Compares two strings based not on the strings themselves, but on an encoding of the two strings using the StringEncoder this Comparator was created with.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

StringEncoderComparator

@Deprecated
public StringEncoderComparator()

Deprecated.

Creating an instance without a StringEncoder leads to a NullPointerException. Will be removed in 2.0.

Constructs a new instance.

StringEncoderComparator

public StringEncoderComparator(StringEncoder stringEncoder)

Constructs a new instance with the given algorithm.

Parameters:

stringEncoder - the StringEncoder used for comparisons.

Method Details

compare

public int compare(Object o1,
 Object o2)

Compares two strings based not on the strings themselves, but on an encoding of the two strings using the StringEncoder this Comparator was created with. If an EncoderException is encountered, return 0.

Specified by:

compare in interface Comparator

Parameters:

o1 - the object to compare

o2 - the object to compare to

Returns:

the Comparable.compareTo() return code or 0 if an encoding error was caught.

See Also:

• Comparable